Method of impregnating fabrics.



UNITED @TATES' PATENT @FFIQEQ naunrrz PE'rnnsEN-Hvnn, or COPENHAGEN,DENMARK.

METHOD OF IMPREGNATING FABRICS.

No Drawing.

To all whom z't'may concern:

Be it known that I, LAURITZ PETERSEN- Hvnn, a subject of the King ofDenmark, residing at Copenhagen, Denmark, have invented certain new anduseful Improvements in Methods of Impregnating Fabrics, of which thefollowing is a full, clear, and exact description.

It is a well known fact that solutions of gutta-percha, balata, indiarubber or the like in the known solvents in concentrated state havehardly any penetrative force with reard to fibrous stufis such as linen,Woven belts, and so on.

The reason for this must be found in the fact that these solvents are ofsuch character that by the penetration of or introduction into wovenmaterials, they leave behind on the surface the greater part of theguttapercha, balata or india rubber, and it is only the solvent whichpenetrates.

This present invention endeavors to eliminate these deficiencies byadding to the solution of gutta-percha, balata, or india rubber,sulfonated vegetable oil, for instance Turkey red-oil.

In the present case sulfonated ricinus oil is preferred, but othersulfonated oil may be used.

a An addition to the solution of guttapercha, balata or india rubber ofsuch oil in the proportion of from 2 to 20% has the effect of makingthesolution more penetra- Specification of I-etters Eatent.

Patented Mar. 13, 1917.

Application filed April 2 1916. Serial N 0. 93,307.

tive into Woven substances in each fiber, with .or without theapplication of vacuum or pressure.

By the drying process the sulfonated oil imparts peculiar qualities to"the guttapercha, balata or india rubber of which theprincipalcharacteristic is to make these latter leathery, tough andflexible and better able to resist cpld and heat.

Should it be desired to vulcanize the finished product one mightsimultaneously with the above mentioned solution introduce 2l0% sulfurin dissolved form into" the woven material, and then submit this latterin presence of a witness.

' LAUBITZ PETERSEN-HVIID.

Witness i I. KNoDsnN.

